William Blair & Company
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William Blair & Company’s United States Oil Fund USO Stock Holding History

William Blair & Company’s Portfolio USO Stock Details USO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$358K Sell
3,361
-1,668
-33% -$219K ﹤0.01% 1348
2026
Q1 		$640K Buy
+5,029
New +$446K ﹤0.01% 1061
2022
Q1 		– Sell
-7,188
Closed -$391K – 2013
2021
Q4 		$391K Buy
7,188
+125
+2% +$6.8K ﹤0.01% 1313
2021
Q3 		$371K Sell
7,063
-8
-0.1% -$391 ﹤0.01% 1273
2021
Q2 		$353K Sell
7,071
-115
-2% -$5.19K ﹤0.01% 1288
2021
Q1 		$291K Sell
7,186
-221
-3% -$8.67K ﹤0.01% 1339
2020
Q4 		$245K Sell
7,407
-195
-3% -$5.78K ﹤0.01% 1350
2020
Q3 		$215K Sell
7,602
-746
-9% -$21.8K ﹤0.01% 1270
2020
Q2 		$234K Sell
8,348
-754
-8% -$20.6K ﹤0.01% 1177
2020
Q1 		$307K Buy
9,102
+2,521
+38% +$194K ﹤0.01% 1008
2019
Q4 		$674K Buy
6,581
+62
+1% +$5.89K ﹤0.01% 891
2019
Q3 		$591K Buy
6,519
+188
+3% +$17.7K ﹤0.01% 900
2019
Q2 		$610K Hold
6,331
– – ﹤0.01% 915
2019
Q1 		$633K Sell
6,331
-428
-6% -$39.4K ﹤0.01% 884
2018
Q4 		$522K Buy
6,759
+193
+3% +$19.4K ﹤0.01% 894
2018
Q3 		$815K Sell
6,566
-94
-1% -$10.9K 0.01% 806
2018
Q2 		$802K Sell
6,660
-84
-1% -$9.22K 0.01% 802
2018
Q1 		$706K Sell
6,744
-133
-2% -$13.4K 0.01% 807
2017
Q4 		$661K Sell
6,877
-9,724
-59% -$863K ﹤0.01% 871
2017
Q3 		$1.39M Buy
+16,601
New +$1.31M 0.01% 636
2016
Q4 		– Sell
-5,712
Closed -$499K – 1472
2016
Q3 		$499K Sell
5,712
-786
-12% -$66K ﹤0.01% 834
2016
Q2 		$601K Buy
6,498
+405
+7% +$36.3K 0.01% 750
2016
Q1 		$472K Buy
6,093
+437
+8% +$32.6K ﹤0.01% 807
2015
Q4 		$497K Buy
5,656
+2,250
+66% +$240K ﹤0.01% 807
2015
Q3 		$399K Buy
3,406
+1,887
+124% +$232K ﹤0.01% 1058
2015
Q2 		$241K Sell
1,519
-40
-3% -$6.35K ﹤0.01% 2003
2015
Q1 		$209K Buy
+1,559
New +$224K ﹤0.01% 2008

Other funds holding USO

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Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $71.2B AUM 48.86% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
CBU
CIBC Bancorp USA Chicago, Illinois $82.3B AUM
HF
HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $171B AUM 85% 1-Year Est. Return
CIBC World Market
CIBC World Market Toronto, Ontario, Canada $62.3B AUM 44.64% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
QC
Quadrature Capital London, United Kingdom $11.7B AUM 87.29% 1-Year Est. Return

William Blair & Company's USO Position: Q2 2026 in Review

William Blair & Company reduced its United States Oil Fund (USO) stake by 33% in Q2 2026, selling an estimated $219K and leaving 3,361 shares worth $358K. The position accounts for ﹤0.01% of the portfolio, ranked #1348.

William Blair & Company first reported a position in USO in Q1 2015 and has held it in 27 quarters since. The position peaked at $1.39M in Q3 2017. 172 funds tracked by Wall St. Rank hold USO as of Q2 2026.

  • William Blair & Company held 3,361 shares of United States Oil Fund worth $358K as of Q2 2026.
  • William Blair & Company sold 1,668 United States Oil Fund shares in Q2 2026, an estimated $219K.
  • United States Oil Fund made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1348 holding.
  • William Blair & Company first reported a position in United States Oil Fund in Q1 2015 and has held it in 27 quarters since.
  • William Blair & Company's United States Oil Fund position peaked at $1.39M in Q3 2017.
  • 172 funds tracked by Wall St. Rank held United States Oil Fund as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.